From: Steve Dickson <SteveD@redhat.com>
Subject: Re: NFS: unknown mount option: grpid
Date: Thu, 10 Apr 2008 12:07:46 -0400
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Cc: NFS list <linux-nfs@vger.kernel.org>,
	Linux NFSv4 mailing list <nfsv4@linux-nfs.org>,
	Jan Sanders <jsanders@TechFak.Uni-Bielefeld.DE>
To: "J. Bruce Fields" <bfields@fieldses.org>
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J. Bruce Fields wrote:
>>>>> The mount call returns with EINVAL invalis argument.
>>>>>
>>>>>  From strace:
>>>>> mount("nfs-server:/volumes/www", "/vol/www", "nfs", MS_NOSUID,
>>>>> "grpid,addr=192.168.0.123") = -1 EINVAL (Invalid argument)
>>>>>
>>
>> However, I was not aware of a requirement for NFS mount to ignore all  
>> options it doesn't understand.
>>
>> It's easy enough to add, I suppose.  Community opinion?
> 
> This is exactly what "-s" ("sloppy") is supposed to do, right?  At
> least, that's what "man mount" says.
Not exactly... Looking at the code it seems '-s' will cause the mount.nfs 
command to ignore unknown _nfs_ options. In this case it appears the
sys_mount call is failing which something different.

steved.