[PATCH V2] xfstests 206: test for overflow in growfs size calculation

[Eric Sandeen]

Christoph Hellwig wrote:
> On Thu, May 28, 2009 at 04:12:53PM -0500, Eric Sandeen wrote:
>> Test trim of last small AG for large filesystem resizes
>>
>> As reported at
>> http://article.gmane.org/gmane.comp.file-systems.xfs.general/29187
>> this trimming may cause an overflow in the new size calculation.
>>
>> Patch to fix it, and testcase at
>> http://article.gmane.org/gmane.comp.file-systems.xfs.general/29193
>>
>> V2: now with proper expected (resized) output!
> 
> This fails for me in really weird ways (Debian -testing, i386):
> 
> 
> --- 206.out	2009-05-29 14:44:54.000000000 +0000
> +++ 206.out.bad	2009-05-29 14:46:01.000000000 +0000
> @@ -1,30 +1,18 @@
>  QA output created by 206
>  === xfs_io ===
> +ftruncate: File too large

hm, 32-bit.  crud.  Should probably just restrict the test to 64-bit
systems, since we need a file > 16T.

What's weirder is that xfs_io shoulda caused an error and caused the
test to bail, I think.

As for the rest of it, I need better error handling I guess :)

-Eric