Should NVME_SC_INVALID_NS be translated to BLK_STS_IOERR instead of BLK_STS_NOTSUPP so that multipath(both native and dm) can failover on the failure?

[Christoph Hellwig]

On Mon, Dec 04, 2023 at 09:37:56PM -0700, Keith Busch wrote:
> So the controller through that path used to be able to access the
> Namespace, then suddenly lost ability to do so, but some other path can
> still access it if we retry on a failover/alternate path? I think your
> target is returning the wrong error code. It should be SCT/SC 303h,
> Asymmetric Access Persistent Loss (NVME_SC_ANA_TRANSITION), for what
> you're describing.

Yes, assuming ANA is actually supported by the controllers..