[PATCH V2] nvme: report capacity 0 for non supported ZNS SSDs

[Hannes Reinecke]

On 11/4/20 3:29 PM, hch at lst.de wrote:
> On Wed, Nov 04, 2020 at 03:26:46PM +0100, Hannes Reinecke wrote:
>> I hardly dare to mention bsg here; but the is pretty similar to what it set
>> out to do ...
> 
> Except that:
> 
>   a) we created a complete mess with bsg by overloading the scsi ioctls
>      with some of the transport stuff.
>   b) bsg would not work with existing tools.  A character device that
>      accepts the same ioctl will just work.
> 
... as would a bsg device which could accept said ioctl ...

Plus it feels a bit weird, having a generic command passthrough 
character device which is then avoided in favour of a protocol-specific 
command passthrough device.
Which we had been arguing for years with IHVs for _not_ doing it.
So what is different here?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare at suse.de                              +49 911 74053 688
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