Re: [nfsv4] (no subject) - Owner Group attr strings.

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From: Spencer Shepler (spencer.shepler@sun.com)
Date: 03/02/04-10:56:16 AM Z


Message-Id: <853EB9CB-6C6A-11D8-A9CF-000A95DBCB70@sun.com>
From: Spencer Shepler <spencer.shepler@sun.com>
Subject: Re: [nfsv4] (no subject) - Owner Group attr strings.
Date: Tue, 2 Mar 2004 10:56:16 -0600


On Mar 2, 2004, at 10:43 AM, Stevan Steve Allen wrote:

>
> >On Mar 3, Spencer wrote:
>  >
>  >I don't see any value for a server to return internal string
>  >identifiers for owner/group. The client will likely
> >not have any reasonable means of mapping them to its
>  >own APIs for use by the application or end user.  
>
> From my small world, there seems to be a strong urge to return 
> something for owner/owner_group in the event of an -ls/dir command. 
>  Either the server internal string (possibly appending 
> @server_domain), or the server assigned UID/GID in string format.  
>
> Sorry to say I'm not familiar with the clients view of this topic or 
> the reason to map such strings.

At least the Solaris client (and most unix derivatives) will take the 
owner/group strings
and map them to the uid/gid integer values that are present in the 
various attribute
structures in APIs like stat().  Therefore, the client will take your 
server's owner/group string
and attempt to map and it will likely end up mapping to "nobody" 
because it is unable
to map it appropriately.  There will be a total loss of information; 
given that you know that
your internal strings don't map to even the uid/gid (I am assuming 
this) it doesn't seem
worthwhile in providing the info.

If there were clients that just passed the owner/group strings back 
through their
local APIs unmapped then there may be some value but I don't know of 
such
clients at this point.

Spencer




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