Socket related code duplication in NFS

Robert Watson rwatson at
Thu May 21 10:36:50 UTC 2009

On Wed, 20 May 2009, Robert Watson wrote:

> On Wed, 20 May 2009, Andre Oppermann wrote:
>> While working on an optimized soreceive_stream() function [1] and checking 
>> the code how it is used I've come across quite a bit of code duplication in 
>> the various NFS directories.
>> Socket (read) operations are handled multiple times in a very similar 
>> manner in these places:
> My recommendation would be to do this analysis against the new NFS client 
> and server found in sys/{kgssapi,nlm,fs/{nfs,nfsclient,nfsserver}}, which is 
> the NFSv234 implementation.  Note in particular that in the new world order 
> there's a centralize RPC implementation.
> The code you're looking at is a blend of the old NFSv23 client/server 
> (nfsclient/nfsserver) and the old NFSv4 client (rpc/nfs4client), all if 
> which are on a gradual de-orbit burn.

After re-reading this e-mail, I realize that I'd mislabeled src/sys/rpc as 
being only used by the old code -- this is in fact not the case, it's also 
used by the new code.

Robert N M Watson
Computer Laboratory
University of Cambridge

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