[PATCH v1 0/2] Fix failover to non integrity NVMe path

[Christoph Hellwig]

On Mon, Apr 24, 2023 at 08:10:59AM +0200, Hannes Reinecke wrote:
> Yeah, I'm slightly unhappy with this whole setup.
> If we were just doing DIF I guess the setup could work, but then we have to 
> disable DIX (as we cannot support integrity data on the non-PI path).
> But we would need an additional patch to disable DIX functionality in those 
> cases.

NVMeoF only supports inline integrity data, the remapping from out of
line integrity data is always done by the HCA for NVMe over RDMA,
and integrity data is not supported without that.

Because of that I can't see how we could sensibly support one path with
integrity offload and one without.  And yes, it might make sense to
offer a way to explicitly disable integrity support to allow forming such
a multipath setup.