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Re: [nfsv4] Path forward for flex-files

Rick Macklem <rmacklem@uoguelph.ca> Mon, 07 August 2017 19:19 UTC

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From: Rick Macklem <rmacklem@uoguelph.ca>
To: Olga Kornievskaia <aglo@citi.umich.edu>
CC: "nfsv4@ietf.org" <nfsv4@ietf.org>, David Noveck <davenoveck@gmail.com>, Thomas Haynes <loghyr@primarydata.com>
Thread-Topic: [nfsv4] Path forward for flex-files
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Date: Mon, 07 Aug 2017 19:19:10 +0000
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Subject: Re: [nfsv4] Path forward for flex-files
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Olga Kornievskaia wrote:

> dot-x defs: https://www.rfc-editor.org/rfc/rfc7531.txt
>
>   typedef utf8str_mixed   fattr4_owner;
>   typedef utf8str_mixed   fattr4_owner_group;
Oh well. I've never looked at that RFC.
The draft could just be changed to define the ffds_user and ffds_group as opaque<>
instead of utf8str_mixed? (I don't think this would affect extant implementations,
which will just assume a utf string is in there and can't handle/support Kerberos.)
[stuff snipped]
> That's the problem you need something in the structure to pass back
> the ticket (TGT is not necessary. service ticket would do). Besides
> the ticket you need to send the other pieces.
Well, maybe a service ticket would work, but it would require a lot more "hacking"
on the RPCSEC_GSS code, I think?
- During initialization, the RPCSEC_GSS l;ayer normally calls
  gss_init_sec_context(). In the vanilla Heimdal libraries, this works if there
  are valid credentials in the credential cache and those come from the TGT.
  (I'll admit my Kerberos is rusty. If you can easily get gss_init_sec_context() to work
   with a service ticket, then I believe you. Also, I've never worked with the MIT libraries.)

rick

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