From: NeilBrown <neilb@suse.com>
To: Steve Dickson <SteveD@redhat.com>,
        "J. Bruce Fields" <bfields@redhat.com>
Date: Wed, 07 Dec 2016 09:36:52 +1100
Cc: linux-nfs@vger.kernel.org
Subject: Re: [PATCH 03/15] Add /etc/nfs.conf support to rpc.nfsd
In-Reply-To: <8e72acac-42de-bf02-9069-60e7b6a12c04@RedHat.com>
References: <148065078775.28046.5506130555300891075.stgit@noble> <148065110833.28046.2561331715736018574.stgit@noble> <8e72acac-42de-bf02-9069-60e7b6a12c04@RedHat.com>
Message-ID: <87r35k4rcr.fsf@notabene.neil.brown.name>
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On Wed, Dec 07 2016, Steve Dickson wrote:

>> +.B nfsd
>> +Recognized values:
>> +.BR threads ,
>> +.BR grace-time ,
>> +.BR lease-time ,
>> +.BR udp ,
>> +.BR tcp ,
>> +.BR vers2 ,
>> +.BR vers3 ,
>> +.BR vers4 ,
>> +.BR vers4.0 ,
> Do we need both ver4 and ver4.0?

"vers4" allows you to enable or disable v4 has a whole.
The assumption is that if enabled, all minor versions that the kernel
supports will be enabled by default.
vers4.x allows individual minor versions to be disabled, so
 vers4=yes
 vers4.0=no
would disable v4.0, just like "-V4 -N4.0"

I do wonder if this is ever valid though.  Why do we allow minor
versions to be enabled/disabled?
Does it make any sense to enable a non-contiguous set of minor versions?
Should we just have a maximum NFSv4 minor version?

I was trying to duplicate the current functionality as closely as
convenient.  That might not be best in this case.

Thanks,
NeilBrown


>
> steved.
>> +.BR vers4.1 ,
>> +.BR vers4.2 ,
>> +.BR rdma .

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