Re: [PATCH 4/6] Ext4: fail if we try to use hole punch

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On Tue, Nov 16, 2010 at 02:25:35PM +0200, Avi Kivity wrote:
> On 11/15/2010 07:05 PM, Josef Bacik wrote:
>> Ext4 doesn't have the ability to punch holes yet, so make sure we return
>> EOPNOTSUPP if we try to use hole punching through fallocate.  This support can
>> be added later.  Thanks,
>>
>
> Instead of teaching filesystems to fail if they don't support the  
> capability, why don't supporting filesystems say so, allowing the fail  
> code to be in common code?
>

There is no simple way to test if a filesystem supports hole punching or not so
the check has to be done per fs.  Thanks,

Josef

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