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Date: Mon, 31 Aug 2009 16:59:55 +0400
From: Michael Tokarev <mjt@tls.msk.ru>
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Subject: Re: xfs compat_ioctl?
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	<20090831123010.GA2368@infradead.org> <4A9BC8A6.20503@rtr.ca>
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To: Mark Lord <lkml@rtr.ca>
Cc: Christoph Hellwig <hch@infradead.org>, linux-fsdevel <linux-fsdevel@vger.kernel.org>, Linux-kernel <linux-kernel@vger.kernel.org>, xfs@oss.sgi.com

Mark Lord wrote:
> Christoph Hellwig wrote:
>> On Mon, Aug 31, 2009 at 11:02:51AM +0400, Michael Tokarev wrote:
>>> Hello!
>>>
>>> I tried to resize an xfs filesystem on 64bit 2.6.30 kernel
>>> using 32bit userland, and that does not work, in dmesg I see:
>>>
>>> ioctl32(xfs_growfs:24426): Unknown cmd fd(3) 
>>> cmd(400c586e){t:'X';sz:12} arg(ffa56df4) on /mnt
>>> ioctl32(xfs_growfs:24427): Unknown cmd fd(3) 
>>> cmd(400c586e){t:'X';sz:12} arg(ff991254) on /mnt
>>>
>>> so apparently there's no compat_ioctl layer for these ioctls.
>>>
>>> Are there any plans to add these? :)
>>
>> Are you sure you're testing 2.6.30?  The copat ioctls were added in 
>> 2.6.28.
> 
> What command-line flags were you using, Michael ?
> 
> I just tried a simple "xfs_growfs -d" here, and it worked fine.
> This is 2.6.31-rc7-64bit on top of a 32-bit userland.

Damn.  I rebooted to 2.6.27 to test something unrelated, forgot
about it, and later tried xfs_growfs -d, which failed as per above.

And yes indeed, in 2.6.30 everything works as expected.

Please excuse me for the noise.

/mjt

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