Re: [PATCH 0/3] Remove function macros from nfs4_fs.h

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On Wed, Jan 07, 2015 at 01:47:53PM -0500, Weston Andros Adamson wrote:
> Ah, right, but only for state operations that don’t touch the filesystem:
> 
> OP_BIND_CONN_TO_SESSION
> OP_EXCHANGE_ID
> OP_CREATE_SESSION
> OP_DESTROY_SESSION
> OP_DESTROY_CLIENTID
> 
> Which is not that interesting, since the client should already be using the machine cred
> with these operations.
> 
> What is interesting is supporting write and commit (and associated ops, i.e. sequence).
> That way when a client is doing buffered writes and the user cred expires, it can flush the
> locally cached data. This is what the linux client SP4_MACH_CRED feature focused on.
> 
> I think implementing SP4_MACH_CRED for these operations has the issue I mentioned
> earlier: the fh_verify path will have to check credentials against some cached credential
> (tied to the stateid), because request will contain the machine credential and not the user
> credential that previous writes (before cred expiration) used.

Oh, I see.  Yeah, that sounds like a bigger project.

--b.
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