Re: [PATCH 2/2] Enable v4 mounts when either "nfsvers=4" or "vers=4" option are set (vers-02)

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On 08/27/2009 01:58 PM, Chuck Lever wrote:
> 
> On Aug 27, 2009, at 1:48 PM, Trond Myklebust wrote:
> 
>> On Thu, 2009-08-27 at 10:14 -0400, Steve Dickson wrote:
>>> I say we go with the proposed patch since its simple, architecturally
>>> sound, will not cause problems down the road as long as nfs4 remains
>>> a standalone file system and its done! Plus I have a patch waiting
>>> in the wings that actually does make v4 the first mount that is
>>> tried... making v4 the default version...
>>
>> I do worry that if, at some point, we do get rid of the nfs4 filesystem
>> alias then we may find ourselves in trouble if we have a large base of
>> mount programs out there that translate '-t nfs -overs=4' into '-t
>> nfs4'.
Well at that point, if that every and happens and if the mount command is the
only thing that has to change it would a minor miracle... IMHO... 

>>
>> I think that if you want to go down this path, you should somehow ensure
>> that the resulting program is capable of passing '-t nfs -overs=4' down
>> to the kernel (perhaps a configuration file option?).
> 
> My impression was that this mount command behavior would be controlled
> with a kernel version switch in mount.nfs, much the same way that we
> already handle switching between text-based and legacy mounting.  That
> won't help with old nfs-utils on new kernels, though.

Right... and I really don't want to  adding yet another configuration 
option for something that should be so simple... 

steved.
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