[nfsv4] Re: Gunter Van de Velde's Discuss on draft-ietf-nfsv4-layoutwcc-05: (with DISCUSS and COMMENT)

[Thomas Haynes <[e-mail]>]

Hi Gunter,

I was planning on addressing this once I could reply to all the points you raised, but since this is an active discussion, I’ll chime in now.

The lowa_type is a layouttype4, which is defined in Section 3.3.13 of RFC8881 and described in Section 22.5.

As such, the values assigned to a layouttype4 are maintained by IANA.

The current text is:

   The current filehandle and the lowa_stateid identifies the particular
   layout for the LAYOUT_WCC operation.  The lowa_type indicates how to
   unpack the layout type specific payload inside the lowa_body field.
   The lowa_type is defined to be a value from the IANA registry for
   'pNFS Layout Types Registry'.

The lowa_type and the lowa_body are basically an enumerated union.

The second sentence tells us that the lowa_type is to be an existing entry and the third tells us it is from the registry.

I already believe that the two combined accurately provide the context needed.

Thanks,
Tom

> On Jan 9, 2025, at 12:50 AM, Gunter van de Velde (Nokia) <[e-mail]> wrote:
> 
> Hi Murray,
>  
> That sounds what I assumed too, but what is not fully accurately documented in the text.
>  
> Maybe something in the style of below is more accurate?
> “
> The lowa_type value must correspond to an existing entry in the IANA 'pNFS Layout Types Registry' and does not require a new registration.
> ”
>  
> G/
>  
> From: Murray S. Kucherawy <[e-mail] <mailto:[e-mail]>>
> Sent: Thursday, January 9, 2025 7:46 AM
> To: Gunter van de Velde (Nokia) <[e-mail] <mailto:[e-mail]>>
> Cc: The IESG <[e-mail] <mailto:[e-mail]>>; [e-mail] <mailto:[e-mail]>; [e-mail] <mailto:[e-mail]>; [e-mail] <mailto:[e-mail]>; [e-mail] <mailto:[e-mail]>
> Subject: Re: Gunter Van de Velde's Discuss on draft-ietf-nfsv4-layoutwcc-05: (with DISCUSS and COMMENT)
>  
>  
> CAUTION: This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext <http://nok.it/ext> for additional information.
>  
> 
> On Mon, Jan 6, 2025 at 4:57 AM Gunter Van de Velde via Datatracker <[e-mail] <mailto:[e-mail]>> wrote:
> #DISCUSS
> #=======
> 
> # In the IANA section is written that there is no action required, but line 244
> and 245 seem to indicate that there is a code point allocated for lowa_type.
> Maybe i got confused and misunderstood the text, or maybe the needs to describe
> the intent more accurate for NFS unware people as myself?
> 
> 244        The lowa_type is defined to be a value from the IANA registry for
> 245        'pNFS Layout Types Registry'.
>  
> I think what they mean is: The "lowa_type" value is expected to be a value that was previously added to this registry, not that it's making a new registration.
>  
> -MSK