[OpenAFS-devel] afs/auth.h - ktc_token

[Jeffrey Hutzelman]

On Thursday, January 04, 2007 06:11:01 PM -0500 Jeffrey Altman 
<jaltman@secure-endpoints.com> wrote:

> Marcus Watts wrote:
>> Secondly, I don't believe this *particular* structure is exported on
>> the wire.  This could probably be made 64 bits and still work.
>> There are almost certainly going to be local 64-bit rounding
>> issues, especially wherever this thing gets used with openafs &
>> kerberos times (as Jeff points out these have to remain 32-bit for
>> now).  Since this is a kerberos 4 specific structure and kerberos 4
>> itself is "going away" it's unlikely to have its 32-bit time issues
>> fixed - so there will probably never be anything that can make a
>> ktc_token that needs 64 bit timestamps.
>
> ktc_token is communicated via pioctl.  There is no requirement
> that the pioctl client and the AFS cache manager be from the same
> release or even the same distribution.  This data structure really can't
> be changed.

In fact, pioctl arguments _do_ appear on the wire, as part of the rmtsys 
protocol.  This is an ABI and must not change gratuitously.