On Mar 19, 2012, at 2:39 PM, J. Bruce Fields wrote:
> On Mon, Mar 19, 2012 at 02:29:46PM -0400, Chuck Lever wrote:
>>
>> On Mar 19, 2012, at 2:27 PM, J. Bruce Fields wrote:
>>
>>> On Mon, Mar 19, 2012 at 01:47:14PM -0400, Chuck Lever wrote:
>>>>
>>>> On Mar 19, 2012, at 1:36 PM, J. Bruce Fields wrote:
>>>>> Well, sure, but all I'm proposing here is returning NFS4ERR_INUSE in the
>>>>> case where we get setclientid's with the same client-provided id.
>>>>> There'd be no change of behavior in the case of multiple clients sharing
>>>>> an IP (which is fine, of course).
>>>>
>>>> The migration draft proposes that clients use the same nfs_client_id4 string for all of a server's IP addresses. Would a server then be obliged to return NFS4ERR_CLID_IN_USE if a client attempts a SETCLIENTID with the same boot verifier and nfs_client_id4 on more than one IP address for the same server?
>>>
>>> That's also not this case, sorry, this time with all the conditions:
>>>
>>> - if the nfs_client_id4 is the same, and
>>> - if the flavor is auth_sys, and
>>> - if the client IP address is different,
>>> - then return NFS4ERR_INUSE.
>>
>> This still breaks for multi-homed servers and UCS clients. The client IP address can be different depending on what server IP address the client is accessing, but all the other parameters are the same.
>
> OK. So probably there's nothing we can do to help here.
>
> As a bandaid maybe a rate-limited log message ("clientid X now in use
> from IP Y") might help debug these things....
Hm, OK. That implies your server implementation assumes that a clientid4 maps to exactly one client IP address at a time.
--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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